package com.bdqn.crm.config.shiro;


import at.pollux.thymeleaf.shiro.dialect.ShiroDialect;
import com.bdqn.crm.pojo.SysRight;
import com.bdqn.crm.service.SysRightService;
import com.bdqn.crm.service.SysRoleService;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.crazycake.shiro.RedisCacheManager;
import org.crazycake.shiro.RedisManager;
import org.crazycake.shiro.RedisSessionDAO;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.annotation.Resource;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

@Configuration
public class ShiroConfig {

    //注入redis参数，从application.yml配置文件中获得
    @Value("${spring.redis.host}")
    private String host;
    @Value("${spring.redis.port}")
    private int port;
    //@Value("${spring.redis.password}")
    private String password;
    @Value("${spring.redis.timeout}")
    private int timeout;

    @Resource
    private SysRoleService sysRoleService;

    @Resource
    private SysRightService sysRightService;

    /**
     * 使用Mdd5加密
     * @return
     */
//    @Bean
//    public HashedCredentialsMatcher hashedCredentialsMatcher(){
//        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
//        //使用Md5算法进行加密
//        hashedCredentialsMatcher.setHashAlgorithmName("md5");
//        //设置散列次数:也就是说加密几次
//        hashedCredentialsMatcher.setHashIterations(2);
//        return hashedCredentialsMatcher;
//    }
    /**
     2. * 开启 Shiro 注解(如@RequiresRoles,@RequiresPermissions),
     3. * 需借助 SpringAOP 扫描使用 Shiro 注解的类,并在必要时进行安全逻辑验证
     4. * 配置以下两个 bean(DefaultAdvisorAutoProxyCreator 和
     AuthorizationAttributeSourceAdvisor)
     5. */
    @Bean
    public DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator(){
        DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        advisorAutoProxyCreator.setProxyTargetClass(true);
        return advisorAutoProxyCreator;
    }

    /**
     * 开启aop注解
     * @return
     */
    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager){
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }
    public RedisManager redisManager(){
        RedisManager redisManager = new RedisManager();
        redisManager.setHost(host);
        redisManager.setPort(port);
        redisManager.setPassword(password);
        redisManager.setTimeout(timeout);
        return redisManager;
    }
    public RedisCacheManager cacheManager(){
        RedisCacheManager cacheManager = new RedisCacheManager();
        cacheManager.setRedisManager(redisManager());
        //缓存名称
        cacheManager.setPrincipalIdFieldName("usrName");
        //缓存有效时间
        cacheManager.setExpire(5000);
        return cacheManager;
    }
    //会话操作
    public RedisSessionDAO redisSessionDAO(){
        RedisSessionDAO redisSessionDAO = new RedisSessionDAO();
        redisSessionDAO.setRedisManager(redisManager());
        return redisSessionDAO;
    }

    //会话管理
    public DefaultWebSessionManager sessionManager(){
        DefaultWebSessionManager webSessionManager = new DefaultWebSessionManager();
        webSessionManager.setSessionDAO(redisSessionDAO());
        return webSessionManager;
    }

    @Bean(name = "shiroDialect")
    public ShiroDialect shiroDialect(){//thymeleaf 页面上使用 shiro 标签
        return new ShiroDialect();
    }
    @Bean
    public MyShiroRealm myShiroRealm(){//自定义 Realm
        MyShiroRealm shiroRealm = new MyShiroRealm();
        //设置启用缓存，并设置缓存名称
        shiroRealm.setCachingEnabled(true);
        shiroRealm.setAuthorizationCachingEnabled(true);
        shiroRealm.setAuthorizationCacheName("authorizationCache");
        //设置凭证密码匹配器
//        shiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());
        return shiroRealm;
    }
    @Bean
    public SecurityManager securityManager(){//安全管理器 SecurityManager
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        //注入Realm
        securityManager.setRealm(myShiroRealm());
        //注入缓存管理器
        securityManager.setCacheManager(cacheManager());
        //注入会话管理器
        securityManager.setSessionManager(sessionManager());
        return securityManager;
    }
    @Bean
    public ShiroFilterFactoryBean shiroFilterFactoryBean(SecurityManager securityManager){//Shiro 过滤器：权限验证
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();

        //注入 SecurityManager
        shiroFilterFactoryBean.setSecurityManager(securityManager);
        //权限验证：使用 Filter 控制资源(URL)的访问
        shiroFilterFactoryBean.setLoginUrl("/login");
        shiroFilterFactoryBean.setSuccessUrl("/main");
        shiroFilterFactoryBean.setUnauthorizedUrl("/403");//没有权限跳转 403 页面
        Map<String,String> filterChainDefinitionMap = new LinkedHashMap<String,String>();//必须使用 LinkedHashMap(有序集合)
        //配置可以匿名访问的资源(URL)：静态资源
        filterChainDefinitionMap.put("/css/**","anon");
        filterChainDefinitionMap.put("/fonts/**","anon");
        filterChainDefinitionMap.put("/images/**","anon");
        filterChainDefinitionMap.put("/js/**","anon");
        filterChainDefinitionMap.put("/localcss/**","anon");
        filterChainDefinitionMap.put("/localjs/**","anon");
        filterChainDefinitionMap.put("/doLogin","anon");
        filterChainDefinitionMap.put("/logout","logout");//注销过滤器，自动注销

        //配置需要特定权限才能访问的资源(URL)
        //静态授权：包括全部需要特定权限才能访问的资源(URL)
//        filterChainDefinitionMap.put("/user/list","perms[用户列表]");
//        filterChainDefinitionMap.put("/user/add","perms[用户添加]");
//        filterChainDefinitionMap.put("/user/edit","perms[用户编辑]");
//        filterChainDefinitionMap.put("/user/del","perms[用户删除]");


        //动态授权
        List<SysRight> rights = sysRightService.findAllRights();
        for (SysRight right : rights){
            if (right.getRightUrl() !=null && !right.getRightUrl().trim().equals("")){
                filterChainDefinitionMap.put(right.getRightUrl(),"perms["+right.getRightCode()+"]");
            }
        }

        //本次课暂不设置过滤器进行权限验证，下章再学习
        filterChainDefinitionMap.put("/**","authc");  //必须放在过滤器链的最后面

        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactoryBean;
    }
}
